Machine for forming key-seats in hubs of gears, &amp;c.



PATENTED JUNE 19, 1906.

G. E. WEBB. MACHINE EOE EOEMING KEY SEATS 1N EEES 0E GEAES, 5w. APPLICATION FILED FEB 3 1905 NIED ASTATEs GEORGE H, wEBB, OE BAWTVUOKET, RHODE I sLAND.

mAcHlNE Fon Fonmme.. KEY-SEATS 1N Hoes or Gezins, ae.

Specification of Letters Patent.

Patented, June 19, 190e Application led February 3, 1905. Serial No. 243,938.

l `.To all, whom it may concern:

Be it known that I, GEORGE II. WEBB, a

` citizen of theUnited States, residing at Paw- .tucl et', in the lcounty of Providence and State of Rhode Island, have invented certain new and useful Improvements in Machines for Forming Key-Seats in Hubs of Gears, &c., of which the following is a specification.

My invention relates to a key-,seating machine or a machine for cutting key-seats in the hubs of` gears, 195o., and more particularly lto improvements on the key-Seating machine shown and described in United States Let-y ters Patent No. 275,393. Inthe practical. use oi' said patented machine a set of remov-f able bushings carrying uills for supporting the hubs to be key-seated and a set of cutterbars are furnished with each machine, so that key-seats may be cut in hubs having holes therethrough of different diameters.y Inorder to get the best results from the teethon Athe cutter-.bar and to properly cut the key- Seat in the hub with one' movement of the cutterfbar through the hub, it is necessary to 2 5 -have on .the cutter-bars of iXed length as' many teeth as possible for the cuttingsurfa'ce, which extend on the under side of the bar from the extrerneouter end nearly to the l inner end, which is detachably secured in an opening in a block integral wither Jfast on one end of a reciprocating rack. If a vmachine has La set of bushings carrying quills and cut,-j

-ter-bars ada ted to key-seat hubssix inches. long, the qui` l will be six inches long and the cutter-bar will be without teeth for SiX inches beyond. the end of the quill,` making, twelve inches. Now if it isV desired to key-l seat a hub of any other size-as, Jfor. instance, l

one seven anda half inches long-fon this inachine it will be necessary to remove the cutter-bar and place the hub on the quill and then replace the cutter-bar. As the block to which t e cutter-bars are attached is permanently secured top the reciprocating rack and the openlng therein ior'the inner endet the cutter-bars is of .iixed size, it is necessarythat the ,inner ends of the different cutter-.bars io'r; different sizes of .openings in thek different r t hubs shouldbe of uniform size to iit the openiing in said block. ',In case of large` cutterbars the inner end is ofreduced diameter, vand inthe caseioil smallcutterfbars theinner end is of enlarged diametertot the`openingl s -1 in'. the block;r on the rack. In thecase of a vr by the small cutter-har ori-said machine.

The' object of my invention is to provide for the key-seating oi longer hubs. with small openings therethrough by a small cutterrbar on the same machineas said small cutterfbar is used for key-seating Shorter'hubs Without changing or varying the size of the AOpening in the block on the reciprocating rack.

In carryingout my inventionl I provide an auxiliary block for the inner end Q the Small cutter-bars, which is adapted to be readily block on the rack, t0 which the inner ends of the cutter-bars are attached.

My auxiliary block is intended to. be used only when asmall cutter-bar is. used for Small openings in long hubsand when the cutterbar has to be removed to place the hub to be cutter-bar itself from its inner end.

The inner end of the small cutter-bar may be of the same diameter as the rest of; the -smooth part of the cutter-bar, or itmay be of Vless diameter, theV diameter thereof corresponding substantially with the size of the opening in the auxiliary block, adapted to ybe attached-tothe regular block O11 the recprocating rack.

vof reduced size, Which endk extends into the opening in the regular block on the rack and is detachably secured therein by a set-screw or bolt which extends at its inner'end" into a Vrecessed portionin saidfrod, 'The 'other end of my auxiliary block has an openin therein to receive the innerend'of the smaIl cutterhar, the size iesaid opening @Orres Onding to the diameter of the inner end o; said bar. 'There' is also a vertically-extending opening through said auxiliary block, bisecting the with quently said longer huh cannot be key=seated attached to or detached. from the ordinary vkey-seated on the supportingvquillor on the My auxiliary block hasone .end-preferably IOO other opening` to recevea.1fem.o.vf .l.0lelV pin,

' having a reciprocating motion in which preferably has a bifurcated or forked inner end adapted to fit onto the inner end of the cutter-bar and enter recesses on opposite sides thereof to attach the bar to the auxiliary block, all as will be hereinafter described.

I have shown in the drawings a machine corresponding to the machine shown in said Letters Patent No. 27 5 ,393 with my improvements applied thereto.

Referring to the drawings, Figure 1 is a side view of a machine of the class referred to embodying my improvements. Fig. 2 is a detached plan view of the parts shown at the left in Fig. 1 looking in the direction of arrow c, saine ligure. Fig. 31s a section on line 3 3 Fig. 2, looking in the direction of arrow l),

saine figure. F ig. 4 is a plan view of the inner end of a small cutter-bar detached. Fig. 5 is a plan view of my auxiliary block detached. Fig. 6 is a perspective view of the under side of a small cutter-bar detached. Fig. 7 shows the attaching-pin detached looking in the direction of arrow c, Fig. 3 g and Fig. 8 shows the pin shown in Fig. 7 looking in the direction of arrow d, same igure. Figs. 3 to 8, inclusive, are on an enlarged scale.

In the accompanying drawings, 1 is the bed of the machine, supported on legs 2.

3 is a belt-pulley driven by a belt (not shown) and mounted on a shaft 4.

A pinion 5 (indicated by broken lines) meshes with and drives a gear 6, fast on a shaft 7, mounted in bearings 8 on the bed 1. Also fast on the shaft 7 is a pinion 9, meshing with and operating a rack 10, mounted and guideways on the upper side of the bed 1. On the front end of the rack-bar 10 is a block 11, in this instance integral with said rack and having a horizontal opening 11 therethrough. An upright stand or plate 12 is secured on one end of the bed 1 and has in this instance a threaded opening therethrough to receive the threaded end of a bushing 13, having a quill 13 thereon for supporting the hub of the gear or other device to be operated on. The quill 13 is preferably eccentric in cross-section and has a longitudinal opening 13 through its lower part to permit of the reciprocating movement of the cutter-bar 14. The cutter-bar 14 has the cutting-teeth 14 preferably secured in a longitudinal groove or recess in the under side of the bar, with the external line of the teeth tapering slightly outwardly. The inner end of the cutter-bar 14 has no teeth thereon.

All of the above parts may be of the ordinary and well-known construction as shown and described in said Patent No. 275,393.

I will now describe my improvements.

I provide an auxiliary block 15, preferably having a reduced end 15 adapted to extend into the opening 11 in the block 11 and to be secured therein by a set-screw or bolt 17, which turns in a threaded hole in said block ssa-asse 11 and in this instance extends at its inner end into a recess 15 in the upper side of the end 15. The auxiliary block 15 has a horizontally-extending opening therein adapted to receive loosely'lthe inner end 14 of the cutter-bar 14. Said end 14 has preferably, on opposite sides thereof, notches or recesses 14. Extending vertically through the aux iliary block 15 is an opening 15, which cxtends at right angles to and passes through the other opening. (See Fig. 3.) A pin 16, prei erably having one end 16 enlarged and forininga head or engaging surface and its other end slotted oi bifurcated to forni two parallel parts 16, is adapted to he removably inserted into the vertical opening 15 through the block 15. The two parts 16 of said pin enter the recesses 14 in the inner end 14 of the cutterebar 14.

By means of the detachable pin 16 the cutter-bar 14 is detachably connected to the auxiliary block 15, which is secured to the block 11 on the reciprocating moving rackbar 10.

In order to detach the cutter-bar 14 and remove it from the machine preparatory to key-seating a long hub or other device, it is only necessary to remove the pin 16 and after the hub or other device is placed on the quill 13 to replace the cutter-bar 14 and secure the inner end 14 thereof in the block 15 by inserting the pin 16.

The advantages of my improvements will be readily appreciated by those skilled in the art. My auxiliary block 15 may be used on any machine of the class referred to. In keyseating or operating on hubs or other devices with small openings therethrough, where it is necessary to use a small cutter-bar and to remove the cutter-bar at every operation by reason of-the length of the hub preventing it from being passed over the cutter-bar and poh sitioned on the quill the cutter-bar may be quickly and easily removed by simply withdrawing the pin 16 and be replaced and secured in the machine by inserting said pin 16.

It will be understood that the details of construction of my improvements may be varied, if desired, and they may be ada )ted to be applied to any machine for cutting lreyseats or for forming recesses in different devices or for broaching.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the class described, the combination with a reciprocating rack having a block permanently connected thereto, said block being provided with the usual opening adapted toreceive the end of a cutter-bar, of an auxiliary block having a part adapted to iit the usual cutter-bar opening in said permanently-connected block, and means for connecting the end of a cutter-bar to said auxiliary block wherebycutter-bars IIO may be secured directly to the permanentlyconnected block or to the auxiliary block.

2. In a machine ofthe class described, the combination with a reciprocating rack having'a permanent block, said block having the usual opening for securinga cutter-bar therein, an aum'liary block adapted to be secured in the usual cutter-bar openin of the permanent block, said auxiliary b ook having a cutter-bar opening of different size than the corresponding opening of the permanent block, and means for securing a cutter-bar in the opening of the auxiliary block.

8. In a machine of the class described, the combination of a reciprocating rack, a permanent block and an auxiliary block, each provided With means for securing cutter-bars thereto, and means for detachably connecting they auxiliary block to the permanent block so that cutter-bars may be connected directly to the permanent block, or indirectly thereto by means ofthe auxiliary block.

4. In a machine of the class described, the combination of a reciprocating rack, a block permanently secured thereto and having the usual tool-opening for securing a cutter-bar therein, an auxiliary block having a reduced end to it the usual toolopeningin the permanent block, the other end of said auxiliaryblock having a horizontal opening to receive the end of the cutter-bar, and anotheropenin at right an les thereto, and a removable bi rcated pin tted in said last-named opensr ibng and engaging opposite sides ofthe cutter GEORGE n. WEBB. I

Witnesses:

ALBERT E. HAGKING, EDWIN HARRIS. 

